Summarized literature.

In today’s digital age, data centers have become one of the most important infrastructures in businesses and organizations. They store and manage critical enterprise data and resources, as well as being the core support for business operations. However, as data centers grow and expand, cybersecurity has become an important challenge. In order to efficiently retrieve ciphertexts and achieve secure communication between data center and data user, this article proposes a multi-ciphertext equality test broadcast signcryption scheme. The scheme uses broadcast signcryption technology to ensure the confidentiality and unforgeability of messages, and uses multi-ciphertext equality test to achieve efficient retrieval of ciphertexts on cloud servers. Based on the hypothesis of difficult problems, the security of the scheme has been proven under the random oracle model. Numerical analysis shows that our work has relatively high computational and communication efficiency, when the number of receivers is 100, the computational efficiency of our scheme has increased by more than 20% compared to the existing schemes and is suitable for data communication in data center.

当今数字时代，数据中心已成为企业与组织机构至关重要的基础设施之一。其负责存储并管理关键企业数据与资源，同时也是业务运营的核心支撑。然而，随着数据中心规模持续扩张，网络安全已成为一项严峻挑战。为实现密文（ciphertext）的高效检索以及数据中心与数据用户间的安全通信，本文提出一种多密文相等性测试（multi-ciphertext equality test）广播签密（broadcast signcryption）方案。该方案借助广播签密技术保障消息的机密性与不可伪造性，并通过多密文相等性测试实现云服务器上密文的高效检索。基于困难问题假设，本方案的安全性已在随机预言机模型（random oracle model）下得到严格证明。数值分析结果表明，本文方案具备较优的计算与通信效率；当接收方数量为100时，本方案的计算效率相较现有方案提升超过20%，适用于数据中心内的数据通信场景。